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(Solved): (20 points) The borane B - n boranelog((k)/(k_(0))) against \sigma ^(+)for this reaction gives a goo ...
(20 points) The borane B - n boranelog((k)/(k_(0))) against \sigma ^(+)for this reaction gives a good linear fit with \rho =+1.03. The primary kinetic isotope effect
has been measured, giving (k_(H))/(k_(D))=2.57. In most cases, a color change is observed as soon as the reactants are
mixed that is thought to be due to the formation of an initial complex between them.
(a) Propose a mechanism for this reaction that is consistent with the observations.
(b) Explain the meaning of the Hammett plot and kinetic isotope effect in the context of the mechanism.